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1 ?递归树 摘要: 递归 Recursion关键词： 递归树(recursion tree)全排列问题问题描述：用C++写一个函数, 如 Foo(const char *str), 打印出 str 的全排列,如 abc 的全排列: abc, acb, bca, dac, c...
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If so, then the current entry must be a folder, and you push its name and recursion level onto an auxiliary stack as well as adding it to the tree. 如果具有子代，那么当前条目必须是一个文件夹，您要将其名称和递归级别推到辅助堆栈上并将它们添加到树中。 - 2
You should be familiar with the following XML-related, computer-science concepts: tree traversal, recursion, and reuse of data. 应该熟悉下列与 XML 有关的计算机科学概念：树遍历、递归和数据重用。 - 3
Further, it is interesting to note that the order in which DB2 has returned the results exposes how the recursion is processed one level at a time, instead of using a tree-walk. 而且，令人感兴趣的是，DB2返回结果时所依照的顺序暴露了递归如何逐层地而不是采用遍历树的方法进行处理。
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